CN102030548B - Metal ceramic combination sintering free low carbon sliding plate brick and preparation method thereof - Google Patents
Metal ceramic combination sintering free low carbon sliding plate brick and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a metal ceramic combination sintering free low carbon sliding plate brick and a preparation method thereof. The sliding plate brick comprises the following components according to weight percentage: 50%-60% of sintered plate shape alundum, 10%-25% of electric melting akerite, 5%-15% of electric melting mullite, 1%-3% of soot carbon, 3%-8% of Alpha- aluminum oxide micropowder, 5%-10% of silicon carbide, 2%-5% of metallic silicon powder,1%-5% of metallic aluminium powder, 0.5%-1% of boron carbide, 1%-3% of aluminum-silicon alloy powder, and 0.5%-2% of metallic aluminium fiber. In the invention, the product has low carbon, high thermal state strength, thermal shock resistance and good oxidation resistance, hole reaming is uniform, galling is less and the crack is very small; the process of the invention is characterized in that drying is carried out at a low temperature, the production cycle is shortened from 30 days originally to 7 days, the natural gas consumption is reduced to 2.5% of original technology, and the sintering free low carbon sliding plate brick is indeed belongs to the environmental protective and energy-saving and environmental material resistance product.
Description
Technical field
The invention belongs to the inorganic non-metallic fire resisting material field take aluminum oxide, magnesium oxide, silicon-dioxide as base-material, relate in particular to a kind of metal ceramic combination sintering free low carbon sliding plate brick and preparation method thereof.
Background technology
1, by being installed in the slide brick of ladle, middle bag bottom, play the regulating and controlling effect of molten steel flow, it is not subjected to, and molten steel stirs, flux sprays into and the impact of the molten steel residence time, and easy to operate, adopt slide brick easily to realize the continuous-casting steel pouring operation automation, the residence time of elimination molten steel, slag and the duration of pouring are on the impact of flow control.Slide brick is the control device of molten steel in the continuous caster casting cycle, can accurately regulate the molten steel flow from ladle to the continuous casting tundish, makes the molten steel that flows into and flow out reach balance, thereby makes more easily control of continuous casting operation.The slide gate nozzle system is good because of controllability, can improve STEELMAKING PRODUCTION efficient.
2, in the selection of big slide plate brick material, domestic and international general aluminium carbon, aluminium zirconium carbon, magnalium carbon, magnalium zirconium carbonaceous four classes.All adopt 1400-1500 ℃ of carbon protection high temperature to burn till, behind dipping tar, pitch, carry out again destructive distillation and coke cleaning.This production technique not only energy consumption is high, and gas consumption is up to 1800 cubic metres/ton, and tar, pitch produces a large amount of objectionable impuritiess when dipping, destructive distillation and coke cleaning, and environment, human health are had a huge impact; Production cycle needs one month simultaneously.By contrast, aluminium carbon, aluminium zirconium carbonaceous heat-shock resistance are better than magnalium carbon, magnalium zirconium carbonaceous, but corrosion resistance decreases, especially when the steel grades such as cast high-oxygen steel, high mangaenese steel, Ca processing steel, killed steel, because the oxygen in the molten steel and the reaction of the carbon in the slide brick, lose carbon because of oxidation and form metamorphic layer, short texture is washed off by steel and damages; Al in the slide brick
2O
3Cause chemical erosion serious with FeO (MnO) the reaction generation eutectic in the molten steel.
3, slide brick is the functional refractory materials of continuous casting, requires to have higher hot strength, preferably heat-shock resistance, oxidation-resistance.Now widely used Al
2O
3-C and Al
2O
3-ZrO
2The carbon content of-C slide brick is 6%～11%, and needs high temperature (1400 ℃) to burn till.Along with the development of the high-quality steel such as soft steel, must reduce slide brick the carburetting of molten steel is polluted, and require in reducing slide brick, still to keep its preferably heat-shock resistance and higher hot strength in the carbon content.In addition, for satisfying energy-conservation and requirement environmental protection, hope can suitably reduce the firing temperature of slide brick.
Summary of the invention
The object of the present invention is to provide a kind of metal ceramic combination sintering free low carbon sliding plate brick.
Another object of the present invention is to provide a kind of preparation method of metal ceramic combination sintering free low carbon sliding plate brick.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of metal ceramic combination sintering free low carbon sliding plate brick comprises following component: sintering plate corundum, electric smelting spinel, electrofused mullite, carbon black, Alpha-alumina (α-Al
2O
3) micro mist, silicon carbide, metallic silicon power, metallic aluminium powder, norbide, aluminum silicon alloy powder, metallic aluminium fiber, above each component is bonded together by wedding agent; Wherein the weight percentage of each component is: sintering plate corundum is 50%～60%, electric smelting spinel 10%～25%, electrofused mullite 5%～15%, carbon black 1%～3%, Alpha-alumina (α-Al
2O
3) micro mist 3%～8%, silicon carbide 5%～10%, metallic silicon power 2%～5%, metallic aluminium powder 1%～5%, norbide 0.5%～1%, aluminum silicon alloy powder 1%～3%, metallic aluminium fiber 0.5%～2%.
Above-mentioned metal ceramic combination sintering free low carbon sliding plate brick, it is that described wedding agent is liquid phenolic resin, the consumption of liquid phenolic resin accounts for 3%～6% of described each component total amount by weight.
Above-mentioned metal ceramic combination sintering free low carbon sliding plate brick, it is described sintering plate corundum Al
2O
3Content 〉=99.5%, electric smelting spinel: Al
2O
3Content 〉=70%, MgO content 〉=25%, electrofused mullite: Al
2O
3Content 〉=75%, SiO
2Content≤25%, Alpha-alumina (α-Al
2O
3) micro mist alumina content 〉=98%, metallic silicon power Si content 〉=98%, metallic aluminium powder Al content 〉=99%, carbon black C content 〉=97%.
Above-mentioned metal ceramic combination sintering free low carbon sliding plate brick, it is the grain composition of each component: the sintering plate corundum particle diameter is that (3～2,2～1,1～0.5,0.5～0) mm, electric smelting spinel are that 320 orders, electrofused mullite are that 250 orders, Alpha-alumina micro mist diameter are that 1 μ m, silicon-carbide particle diameter 1～0mm, metallic silicon power 400 orders, metallic aluminium powder 180 orders, norbide are that 320 orders, aluminum silicon alloy powder 320 orders, metallic aluminium fiber are 3mm * 0.09mm (the long 3mm of metallic aluminium fiber, diameter are 0.09mm).
Above-mentioned metal ceramic combination sintering free low carbon sliding plate brick, the grain composition of described sintering plate corundum by weight percentage composition are:
3～2mm，8％～13％
2～1mm，11％～17％
1～0.5mm，17％～23％
0.5～0mm，8％～12％。
A kind of preparation method of metal ceramic combination sintering free low carbon sliding plate brick, it is that this slide brick comprises following component: sintering plate corundum, electric smelting spinel, electrofused mullite, carbon black, Alpha-alumina (α-Al
2O
3) micro mist, silicon carbide, metallic silicon power, metallic aluminium powder, norbide, aluminum silicon alloy powder, metallic aluminium fiber, above each component is bonded together by wedding agent; Wherein the weight percentage of each component is: sintering plate corundum is 50%～60%, electric smelting spinel 10%～25%, electrofused mullite 5%～15%, carbon black 1%～3%, Alpha-alumina (α-Al
2O
3) micro mist 3%～8%, silicon carbide 5%～10%, metallic silicon power 2%～5%, metallic aluminium powder 1%～5%, norbide 0.5%～1%, aluminum silicon alloy powder 1%～3%, metallic aluminium fiber 0.5%～2%, stir after mixing with wedding agent by the component of said ratio, then after moulding and the seasoning, put into moisture eliminator and slowly heated up dry 45～60 hours, dryer temperature is no more than 200 ℃.
The preparation method of above-mentioned metal ceramic combination sintering free low carbon sliding plate brick, it is that described wedding agent is liquid phenolic resin, the consumption of resol accounts for 3%～6% of each component total amount by weight; The described slow dry process that heats up is: in 1 hour dryer temperature evenly is warmed up to 100 ℃, and 100 ℃ of insulations 12 hours, then in 24 hours temperature is evenly risen to 200 ℃ from 100 ℃, then 200 ℃ of lower insulations 15 hours.
The preparation method of above-mentioned metal ceramic combination sintering free low carbon sliding plate brick, it is described sintering plate corundum Al
2O
3Content 〉=99.5%, electric smelting spinel: Al
2O
3Content 〉=70%, MgO content 〉=25%, electrofused mullite: Al
2O
3Content 〉=75%, SiO
2Content≤25%, Alpha-alumina micro mist alumina content 〉=98%, metallic silicon power Si content 〉=98%, metallic aluminium powder Al content 〉=99%, carbon black C content 〉=97%.
Above-mentioned metal ceramic combination sintering free low carbon sliding plate brick, it is the grain composition of each component: the sintering plate corundum particle diameter is that (3～2,2～1,1～0.5,0.5～0) mm, electric smelting spinel are that 320 orders, electrofused mullite are that 250 orders, Alpha-alumina micro mist diameter are that 1 μ m, silicon-carbide particle diameter 1～0mm, metallic silicon power 400 orders, metallic aluminium powder 180 orders, norbide are that 320 orders, aluminum silicon alloy powder 320 orders, metallic aluminium fiber are 3mm * 0.09mm (the long 3mm of metallic aluminium fiber, diameter are 0.09mm).
Above-mentioned metal ceramic combination sintering free low carbon sliding plate brick, its grain composition that is sintering plate corundum by weight percentage composition is:
3～2mm，8％～13％
2～1mm，11％～17％
1～0.5mm，17％～23％
0.5～0mm，8％～12％。
Each component in the slide brick can form three kinds in conjunction with phase: carbonization coking after (1) resol and the carbon black drying forms carbon in conjunction with phase; (2) metallic silicon power in applied at elevated temperature with soot formation β-SiC, in the brick body, form the Ceramic bond phase; (3) in material, add metallic aluminium powder and metallic silicon power, by heat-treating, produce molten metal in conjunction with phase.This obviously improves the intensity of slide plate, and in use after the carbon element after-flame, because the effect of metal, Ceramic bond system also can keep enough residual strengths.Add the Alpha-alumina micro mist and also can promote the effect of product sinter bonded, strengthen product strength.
The major cause that affects invention product work-ing life is to form various crackles by the thermal stresses effect, and in order to improve the work-ing life of slide brick, adopting low-expansion material is the most effective approach.The coefficient of expansion of mullite material is low, as the slide brick raw material, can reduce the coefficient of expansion of slide brick and improve thermal shock resistance; The corundum erosion-resisting characteristics is good, but the coefficient of expansion is higher than mullite; The mullite of certain content is conducive to improve the thermal shock resistance of slide brick, but along with the raising of mullite content, the erosion-resisting characteristics of slide brick descends.Therefore the mullite add-on is no more than at most 15% in the slide brick; Mullite content is crossed low then slide brick thermal shock resistance and is descended, and the mullite add-on is minimum to be not less than 5%.
Improve the carbon content of slide brick, can strengthen its thermal shock resistance, but along with the increase of carbon content, the oxidized danger of slide brick also increases thereupon; In case oxidized, the antiscour of slide brick and corrosion resistance reduce; The addition of carbon raw has a great impact erosion-resisting characteristics and the thermal shock resistance of slide brick, so the addition of carbon black in the slide brick is controlled at 1%～3%, can keep the resistance of oxidation of slide brick, then in product, add high temperature resistance thermal shock performance and the antistrip performance that aluminum fiber is used for improving slide brick, can effectively reduce like this slide brick in use owing to the phenomenon that crackle produces, the aperture decreases, peel off in the outside, strengthen medium and high temperature strength and the fracture resistance of slide brick.
Carbon black belongs to non-quality carbon element, is easy to form Ceramic bond with metallic silicon power reaction generation β-SiC, is difficult to dissolving in steel, can improve brick body microstructure, improves mechanical property and erosion-resisting characteristics.Not favourable to the oxidation-resistance that improves slide brick with the metallic silicon power of carbon black reaction, in 2%～5% scope, the add-on of metallic silicon power is more, and antioxidant effect is better, and metallic silicon power is thinner, more is conducive to the even of its distribution.A small amount of metallic aluminium powder can obviously improve normal temperature withstand voltage properties and the folding strength (high temperature) of slide brick; Be 6% at metallic silicon power and metallic aluminium powder total amount, metallic silicon power/metallic aluminium powder=2 o'clock, oxidation-resistance and the erosion-resisting characteristics of material are best.
The effect that adds SiC is medium and high temperature strength and the oxidation-resistance that improves slide brick.Organize embrittlement for preventing from making in conjunction with oxidation of coal, three kinds of good metallic aluminium powder, metallic silicon power, B4C (norbide) of oxidation-protective effect have been taked optimum addition: the addition that reduces the metallic aluminium powder of enhanced tissue combination, preventing the addition of the good B4C of oxidation effectiveness (norbide) when preventing the addition of the metallic silicon power that oxidation effectiveness is good and low temperature when increasing high temperature, is very effective to postponing oxidation.
Beneficial effect of the present invention:
1, energy-conserving and environment-protective advantage: because traditional Firing slide plate brick adopts 1400 ℃～1600 ℃ carbon protection high temperature to burn till, behind dipping tar, pitch, carry out again destructive distillation and coke cleaning.This production technique not only energy consumption is high, and gas consumption is up to 1800 cubic metres of/ton products, and tar, pitch produces a large amount of objectionable impuritiess when dipping, destructive distillation and coke cleaning, and environment, human health are had a huge impact; Production cycle of the present invention shortened to 7 days from original 30 days, and gas consumption is reduced to 50 cubic metres of/ton products, was 2.5% of former technique, and sintering free low carbon sliding plate brick really belongs to environmental protection, energy-conservation green anti-section product.
2, meeting the market requirement: along with the development of the high-quality steel such as soft steel, Clean Steel, prevent that molten steel from polluting for the second time, the essential slide brick that reduces pollutes the carburetting of molten steel, and requires in the carbon content, still to keep its preferably heat-shock resistance and higher hot strength in reducing slide brick.The existence of carbon is disadvantageous to the casting of high purity steel obviously.Therefore, the present invention is by the improvement of material, and exploitation low-carbon (LC) continuous casting refractory material to reduce as far as possible carbon to the pollution of molten steel, also reaches the purpose that improves its work-ing life simultaneously.
3, the performance advantage of product of the present invention: the invention product belongs to energy-saving low-carbon (LC) Al-Si metal bonded Al
2O
3-C slide brick, its process characteristic are low temperature (not being higher than 200 ℃) dryings, and product performance is low-carbon (LC), with Al commonly used
2O
3-C and Al
2O
3-ZrO
2-C high temperature burns till the oil immersion slide brick and compares, and has higher hot strength, preferably heat-shock resistance and oxidation-resistance.Use through the batch of big-and-middle-sized ladle to show, its continuous access times are that high temperature burns till Al
2O
31.5 times of-C slide brick are better than Al
2O
3-ZrO
2-C slide brick, even with the reaming of tail skid brick, plucking is less, and crackle is fine.
Embodiment
Embodiment 1
Invention product basic production technique is: press the prescription in the table 1, sintering plate corundum (Al
2O
3Content 〉=99.5%) behind crushing and screening, prepares burden by the prescription in the table 1, add in edge runner-wet mill or the high speed muller and mixed 3～5 minutes, add the liquid phenolic resin wedding agent, add again carbon black (model: N330), metallic silicon power (Si content 〉=98%), silicon carbide, norbide, metallic aluminium powder (Al content 〉=99%), electric smelting spinel (Al behind the mixing
2O
3Content 〉=70%, MgO content 〉=25%), electrofused mullite (Al
2O
3Content 〉=75%, SiO
2Content≤25%), aluminum silicon alloy powder, metallic aluminium fiber, Alpha-alumina micro mist (alumina content 〉=98%), mix discharging in 10～30 minutes.Moulding adopts that high tonnage vacuumizes brick pressing machine more than 630 tons, shape, size according to brick, the accurate weighing material, load weighted material joins in the mould, be molded into specified dimension, every brick will be measured physical dimension, planeness, Diagonal Dimension, and per tour will be spot-check 10% substance, each car brick will detect void content, volume density, and reason must be scrapped and search to the defective phenomenon of all discoveries.Adobe after the moulding generally needs just can enter moisture eliminator after seasoning, adobe is in moisture eliminator, in 1 hour, evenly be warmed up to 100 ℃, and 100 ℃ of insulations 12 hours, then in 24 hours temperature is evenly risen to 200 ℃ from 100 ℃, then carry out drying at 15 hours heating curve of 200 ℃ of lower insulations, dried adobe could loading of kiln through work in-process qualified after checking.In order to improve the usability of slide plate, prevent generation and the expansion of crackle, be with steel band to the hoop-driving of slide plate periphery.Opening the handiness that is pulled through in the journey in order to improve slide plate, preventing that from bleed-out between the slipping plane, slipping plane will be processed at grinding machine, requires planeness less than 0.05mm.Slide plate after grinding will be pasted asbestos pad and tinplate overleaf through after the assay was approved, and its effect mainly is to reduce to be delivered to heat on the slide mechanism by slide brick, prevents from burning mechanism.
The consumption of each component and wedding agent in 3 prescriptions of table 1 product of the present invention
Table 2 is according to the physical and chemical testing index synopsis of 3 prepared products of prescription in the table 1
According to the assay in the table 2 as can be known: above 3 prescriptions can both normally use, 1 best results of filling a prescription.
Claims (8)
1. metal ceramic combination sintering free low carbon sliding plate brick, it is characterized in that comprising following component: sintering plate corundum, electric smelting spinel, electrofused mullite, carbon black, Alpha-alumina micro mist, silicon carbide, metallic silicon power, metallic aluminium powder, norbide, aluminum silicon alloy powder, metallic aluminium fiber, above each component is bonded together by wedding agent; Wherein the weight percentage of each component is: sintering plate corundum is 50%～60%, electric smelting spinel 10%～25%, electrofused mullite 5%～15%, carbon black 1%～3%, Alpha-alumina micro mist 3%～8%, silicon carbide 5%～10%, metallic silicon power 2%～5%, metallic aluminium powder 1%～5%, norbide 0.5%～1%, aluminum silicon alloy powder 1%～3%, metallic aluminium fiber 0.5%～2%; Described wedding agent is liquid phenolic resin, and the consumption of liquid phenolic resin accounts for 3%～6% of described each component total amount by weight.
2. metal ceramic combination sintering free low carbon sliding plate brick according to claim 1 is characterized in that described sintering plate corundum Al
2O
3Content 〉=99.5%, electric smelting spinel: Al
2O
3Content 〉=70%, MgO content 〉=25%, electrofused mullite: Al
2O
3Content 〉=75%, SiO
2Content≤25%, Alpha-alumina micro mist alumina content 〉=98%, metallic silicon power Si content 〉=98%, metallic aluminium powder Al content 〉=99%, carbon black C content 〉=97%.
3. metal ceramic combination sintering free low carbon sliding plate brick according to claim 1 and 2 is characterized in that the grain composition of each component: the sintering plate corundum particle diameter is that 320 orders, electrofused mullite are that 250 orders, Alpha-alumina micro mist diameter are that 1 μ m, silicon-carbide particle diameter 1～0mm, metallic silicon power 400 orders, metallic aluminium powder 180 orders, norbide are that 320 orders, aluminum silicon alloy powder 320 orders, metallic aluminium fiber are 3 mm * 0.09mm for (3～2,2～1,1～0.5,0.5～0) mm, electric smelting spinel.
4. metal ceramic combination sintering free low carbon sliding plate brick according to claim 3, the grain composition that it is characterized in that sintering plate corundum by weight percentage composition is:
3～2mm， 8%～13%
2～1 mm， 11%～17%
1～0.5 mm，17%～23%
0.5～0 mm，8%～12% 。
5. the preparation method of a metal ceramic combination sintering free low carbon sliding plate brick, it is characterized in that this slide brick comprises following component: sintering plate corundum, electric smelting spinel, electrofused mullite, carbon black, Alpha-alumina micro mist, silicon carbide, metallic silicon power, metallic aluminium powder, norbide, aluminum silicon alloy powder, metallic aluminium fiber, above each component is bonded together by wedding agent; Wherein the weight percentage of each component is: sintering plate corundum is 50%～60%, electric smelting spinel 10%～25%, electrofused mullite 5%～15%, carbon black 1%～3%, Alpha-alumina micro mist 3%～8%, silicon carbide 5%～10%, metallic silicon power 2%～5%, metallic aluminium powder 1%～5%, norbide 0.5%～1%, aluminum silicon alloy powder 1%～3%, metallic aluminium fiber 0.5%～2%, stir after mixing with wedding agent by the component of said ratio, then after moulding and the seasoning, put into moisture eliminator and slowly heated up dry 45～60 hours, dryer temperature is no more than 200 ℃; Described wedding agent is liquid phenolic resin, and the consumption of resol accounts for 3%～6% of described each component total amount by weight; The described slow dry process that heats up is: in 1 hour dryer temperature evenly is warmed up to 100 ℃, and 100 ℃ of insulations 12 hours, then in 24 hours temperature is evenly risen to 200 ℃ from 100 ℃, then 200 ℃ of lower insulations 15 hours.
6. the preparation method of metal ceramic combination sintering free low carbon sliding plate brick according to claim 5 is characterized in that described sintering plate corundum Al
2O
3Content 〉=99.5%, electric smelting spinel: Al
2O
3Content 〉=70%, MgO content 〉=25%, electrofused mullite: Al
2O
3Content 〉=75%, SiO
2Content≤25%, Alpha-alumina micro mist alumina content 〉=98%, metallic silicon power Si content 〉=98%, metallic aluminium powder Al content 〉=99%, carbon black C content 〉=97%.
7. the grain composition that it is characterized in that according to claim 5 or the preparation method of 6 described metal ceramic combination sintering free low carbon sliding plate bricks, each component: the sintering plate corundum particle diameter is that 320 orders, electrofused mullite are that 250 orders, Alpha-alumina micro mist diameter are that 1 μ m, silicon-carbide particle diameter 1～0mm, metallic silicon power 400 orders, metallic aluminium powder 180 orders, norbide are that 320 orders, aluminum silicon alloy powder 320 orders, metallic aluminium fiber are 3 mm * 0.09mm for (3～2,2～1,1～0.5,0.5～0) mm, electric smelting spinel.
8. the preparation method of metal ceramic combination sintering free low carbon sliding plate brick according to claim 7, the grain composition that it is characterized in that sintering plate corundum by weight percentage composition is:
3～2mm， 8%～13%
2～1mm， 11%～17%
1～0.5mm， 17%～23%
0.5～0mm， 8%～12% 。
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| CN115745584A (en) * | 2022-11-14 | 2023-03-07 | 马鞍山利尔开元新材料有限公司 | Sliding plate brick and preparation method thereof |
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| CN1884203A (en) * | 2006-07-05 | 2006-12-27 | 鞍山浦项特种耐火材料有限公司 | Novel aluminum-zirconium-carbon slide brick for flow control in metallurgy industry |
| CN101429037A (en) * | 2007-11-07 | 2009-05-13 | 鞍钢集团耐火材料公司 | Aluminum-carbon sliding tile and method of producing the same |
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